So im just starting to teach myself about tuning.
Here is a couple questions. If you have any links or reading material recommendations associated with these questions I would welcome that.

If your running 8psi, and you turn your boost tap up so your running 15psi, will this change your air/fuel ratio while under boost?
my uneducated guess was the ecu would pump more fuel to keep the set air/fuel mix, and the limit would be the ecu mapping or the type of injectors and fuel pump.

Does your air fuel ratio change while under boost? explain in depth why or why not.


I need to learn more about ecu, mapping and air fuel.... please link me

thanks

 

start here

http://evoscan.com/

 

Depends on what are in the RPM and Load cells in your fuel map. If the fuel map is flat then the fueling would technically not change with WOT load changes like that.

 

If the fuel map isnt richer then the 8 psi load then it will go lean.

If your running 25 psi and 12.0 afr and you raise boost to 30 you would likely go lean.

 

If it's a (stock) AFM based tune then the AFM will read the extra air and provide the extra fuel.
Up to the point where your injectors or pump are close to getting maxed out.